To welcome the arrival of T-Mobile's newest mid-range handsets, the Samsung Exhibit 4G and Gravity SMART, Wirefly is throwing a bone out there to all who are thinking of signing up with Team Magenta. If you walk into a T-Mo retail store looking to pick up either of these devices, then you'll be shelling out $80 for the Exhibit and $70 for the Gravity SMART (or $30 if you get the plain black one), but you can grab them from Wirefly for $50 and free, respectively.